jobs.c revision 100308
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 3. All advertising materials mentioning features or use of this software 171556Srgrimes * must display the following acknowledgement: 181556Srgrimes * This product includes software developed by the University of 191556Srgrimes * California, Berkeley and its contributors. 201556Srgrimes * 4. Neither the name of the University nor the names of its contributors 211556Srgrimes * may be used to endorse or promote products derived from this software 221556Srgrimes * without specific prior written permission. 231556Srgrimes * 241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341556Srgrimes * SUCH DAMAGE. 351556Srgrimes */ 361556Srgrimes 371556Srgrimes#ifndef lint 3836150Scharnier#if 0 3936150Scharnierstatic char sccsid[] = "@(#)jobs.c 8.5 (Berkeley) 5/4/95"; 4036150Scharnier#endif 411556Srgrimes#endif /* not lint */ 4299110Sobrien#include <sys/cdefs.h> 4399110Sobrien__FBSDID("$FreeBSD: head/bin/sh/jobs.c 100308 2002-07-18 10:22:42Z tjr $"); 441556Srgrimes 4517987Speter#include <fcntl.h> 4617987Speter#include <signal.h> 4717987Speter#include <errno.h> 4899762Stjr#include <paths.h> 4917987Speter#include <unistd.h> 5017987Speter#include <stdlib.h> 5117987Speter#include <sys/param.h> 5217987Speter#ifdef BSD 5317987Speter#include <sys/wait.h> 5417987Speter#include <sys/time.h> 5517987Speter#include <sys/resource.h> 5669793Sobrien#include <paths.h> 5717987Speter#endif 5818018Speter#include <sys/ioctl.h> 5917987Speter 601556Srgrimes#include "shell.h" 611556Srgrimes#if JOBS 6217987Speter#include <termios.h> 631556Srgrimes#undef CEOF /* syntax.h redefines this */ 641556Srgrimes#endif 6517987Speter#include "redir.h" 6617987Speter#include "show.h" 671556Srgrimes#include "main.h" 681556Srgrimes#include "parser.h" 691556Srgrimes#include "nodes.h" 701556Srgrimes#include "jobs.h" 711556Srgrimes#include "options.h" 721556Srgrimes#include "trap.h" 731556Srgrimes#include "syntax.h" 741556Srgrimes#include "input.h" 751556Srgrimes#include "output.h" 761556Srgrimes#include "memalloc.h" 771556Srgrimes#include "error.h" 781556Srgrimes#include "mystring.h" 791556Srgrimes 801556Srgrimes 811556Srgrimesstruct job *jobtab; /* array of jobs */ 821556Srgrimesint njobs; /* size of array */ 8328346SsteveMKINIT pid_t backgndpid = -1; /* pid of last background process */ 841556Srgrimes#if JOBS 8597659Stjrstruct job *jobmru; /* most recently used job list */ 86100308Stjrpid_t initialpgrp; /* pgrp of shell on invocation */ 871556Srgrimes#endif 8838536Scracauerint in_waitcmd = 0; /* are we in waitcmd()? */ 8938950Scracauerint in_dowait = 0; /* are we in dowait()? */ 9038536Scracauervolatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ 9199762Stjrstatic int ttyfd = -1; 921556Srgrimes 9320425Ssteve#if JOBS 9490111SimpSTATIC void restartjob(struct job *); 9520425Ssteve#endif 9690111SimpSTATIC void freejob(struct job *); 9790111SimpSTATIC struct job *getjob(char *); 98100308StjrSTATIC pid_t dowait(int, struct job *); 9920425Ssteve#if SYSV 10090111SimpSTATIC int onsigchild(void); 10120425Ssteve#endif 102100308StjrSTATIC pid_t waitproc(int, int *); 10390111SimpSTATIC void cmdtxt(union node *); 10490111SimpSTATIC void cmdputs(char *); 10597659Stjr#if JOBS 10697659StjrSTATIC void setcurjob(struct job *); 10797659StjrSTATIC void deljob(struct job *); 10897659StjrSTATIC struct job *getcurjob(struct job *); 10997659Stjr#endif 11097822StjrSTATIC void showjob(struct job *, pid_t, int, int); 1111556Srgrimes 1121556Srgrimes 1131556Srgrimes/* 1141556Srgrimes * Turn job control on and off. 1151556Srgrimes * 1161556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1171556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1181556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1191556Srgrimes */ 1201556Srgrimes 1211556SrgrimesMKINIT int jobctl; 1221556Srgrimes 12320425Ssteve#if JOBS 1241556Srgrimesvoid 12590111Simpsetjobctl(int on) 12617987Speter{ 12799762Stjr int i; 1281556Srgrimes 1291556Srgrimes if (on == jobctl || rootshell == 0) 1301556Srgrimes return; 1311556Srgrimes if (on) { 13299762Stjr if (ttyfd != -1) 13399762Stjr close(ttyfd); 13499762Stjr if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) { 13599762Stjr i = 0; 13699762Stjr while (i <= 2 && !isatty(i)) 13799762Stjr i++; 13899762Stjr if (i > 2 || (ttyfd = dup(i)) < 0) 13999762Stjr goto out; 14099762Stjr } 14199762Stjr if (fcntl(ttyfd, FD_CLOEXEC, 1) < 0) { 14299762Stjr close(ttyfd); 14399762Stjr ttyfd = -1; 14499762Stjr goto out; 14599762Stjr } 1461556Srgrimes do { /* while we are in the background */ 14799762Stjr initialpgrp = tcgetpgrp(ttyfd); 14820425Ssteve if (initialpgrp < 0) { 14999762Stjrout: out2str("sh: can't access tty; job control turned off\n"); 1501556Srgrimes mflag = 0; 1511556Srgrimes return; 1521556Srgrimes } 1531556Srgrimes if (initialpgrp == -1) 15417987Speter initialpgrp = getpgrp(); 15517987Speter else if (initialpgrp != getpgrp()) { 15699762Stjr killpg(0, SIGTTIN); 1571556Srgrimes continue; 1581556Srgrimes } 1591556Srgrimes } while (0); 1601556Srgrimes setsignal(SIGTSTP); 1611556Srgrimes setsignal(SIGTTOU); 1621556Srgrimes setsignal(SIGTTIN); 16317987Speter setpgid(0, rootpid); 16499762Stjr tcsetpgrp(ttyfd, rootpid); 1651556Srgrimes } else { /* turning job control off */ 16617987Speter setpgid(0, initialpgrp); 16799762Stjr tcsetpgrp(ttyfd, initialpgrp); 16899762Stjr close(ttyfd); 16999762Stjr ttyfd = -1; 1701556Srgrimes setsignal(SIGTSTP); 1711556Srgrimes setsignal(SIGTTOU); 1721556Srgrimes setsignal(SIGTTIN); 1731556Srgrimes } 1741556Srgrimes jobctl = on; 1751556Srgrimes} 17620425Ssteve#endif 1771556Srgrimes 1781556Srgrimes 1791556Srgrimes#ifdef mkinit 18028346SsteveINCLUDE <sys/types.h> 18117987SpeterINCLUDE <stdlib.h> 1821556Srgrimes 1831556SrgrimesSHELLPROC { 1841556Srgrimes backgndpid = -1; 1851556Srgrimes#if JOBS 1861556Srgrimes jobctl = 0; 1871556Srgrimes#endif 1881556Srgrimes} 1891556Srgrimes 1901556Srgrimes#endif 1911556Srgrimes 1921556Srgrimes 1931556Srgrimes 1941556Srgrimes#if JOBS 19517987Speterint 19690111Simpfgcmd(int argc __unused, char **argv) 19717987Speter{ 1981556Srgrimes struct job *jp; 199100308Stjr pid_t pgrp; 2001556Srgrimes int status; 2011556Srgrimes 2021556Srgrimes jp = getjob(argv[1]); 2031556Srgrimes if (jp->jobctl == 0) 2041556Srgrimes error("job not created under job control"); 20596933Stjr out1str(jp->ps[0].cmd); 20696933Stjr out1c('\n'); 20796933Stjr flushout(&output); 2081556Srgrimes pgrp = jp->ps[0].pid; 20999762Stjr tcsetpgrp(ttyfd, pgrp); 2101556Srgrimes restartjob(jp); 211100305Stjr jp->foreground = 1; 2121556Srgrimes INTOFF; 21345916Scracauer status = waitforjob(jp, (int *)NULL); 2141556Srgrimes INTON; 2151556Srgrimes return status; 2161556Srgrimes} 2171556Srgrimes 2181556Srgrimes 21917987Speterint 22090111Simpbgcmd(int argc, char **argv) 22117987Speter{ 22296933Stjr char s[64]; 2231556Srgrimes struct job *jp; 2241556Srgrimes 2251556Srgrimes do { 2261556Srgrimes jp = getjob(*++argv); 2271556Srgrimes if (jp->jobctl == 0) 2281556Srgrimes error("job not created under job control"); 22996933Stjr if (jp->state == JOBDONE) 23096933Stjr continue; 2311556Srgrimes restartjob(jp); 232100305Stjr jp->foreground = 0; 23396933Stjr fmtstr(s, 64, "[%d] ", jp - jobtab + 1); 23496933Stjr out1str(s); 23596933Stjr out1str(jp->ps[0].cmd); 23696933Stjr out1c('\n'); 2371556Srgrimes } while (--argc > 1); 2381556Srgrimes return 0; 2391556Srgrimes} 2401556Srgrimes 2411556Srgrimes 2421556SrgrimesSTATIC void 24390111Simprestartjob(struct job *jp) 24417987Speter{ 2451556Srgrimes struct procstat *ps; 2461556Srgrimes int i; 2471556Srgrimes 2481556Srgrimes if (jp->state == JOBDONE) 2491556Srgrimes return; 25097660Stjr setcurjob(jp); 2511556Srgrimes INTOFF; 2521556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2531556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 25426104Ssteve if (WIFSTOPPED(ps->status)) { 2551556Srgrimes ps->status = -1; 2561556Srgrimes jp->state = 0; 2571556Srgrimes } 2581556Srgrimes } 2591556Srgrimes INTON; 2601556Srgrimes} 2611556Srgrimes#endif 2621556Srgrimes 2631556Srgrimes 2641556Srgrimesint 26597669Stjrjobscmd(int argc, char *argv[]) 26617987Speter{ 26797669Stjr char *id; 26897669Stjr int ch, sformat, lformat; 26997669Stjr 27097669Stjr optind = optreset = 1; 27197669Stjr sformat = lformat = 0; 27297669Stjr while ((ch = getopt(argc, argv, "ls")) != -1) { 27397669Stjr switch (ch) { 27497669Stjr case 'l': 27597669Stjr lformat = 1; 27697669Stjr break; 27797669Stjr case 's': 27897669Stjr sformat = 1; 27997669Stjr break; 28097669Stjr case '?': 28197669Stjr default: 28297669Stjr error("unknown option: -%c", optopt); 28397669Stjr } 28497669Stjr } 28597669Stjr argc -= optind; 28697669Stjr argv += optind; 28797669Stjr 28897669Stjr if (argc == 0) 28997669Stjr showjobs(0, sformat, lformat); 29097669Stjr else 29197669Stjr while ((id = *argv++) != NULL) 29297822Stjr showjob(getjob(id), 0, sformat, lformat); 29397669Stjr 29497669Stjr return (0); 2951556Srgrimes} 2961556Srgrimes 29797663StjrSTATIC void 29897822Stjrshowjob(struct job *jp, pid_t pid, int sformat, int lformat) 29997663Stjr{ 30097663Stjr char s[64]; 30197663Stjr struct procstat *ps; 30297669Stjr struct job *j; 30397669Stjr int col, curr, i, jobno, prev, procno; 30497669Stjr char c; 3051556Srgrimes 30697663Stjr procno = jp->nprocs; 30797663Stjr jobno = jp - jobtab + 1; 30897669Stjr curr = prev = 0; 30997669Stjr#if JOBS 31097669Stjr if ((j = getcurjob(NULL)) != NULL) { 31197669Stjr curr = j - jobtab + 1; 31297669Stjr if ((j = getcurjob(j)) != NULL) 31397669Stjr prev = j - jobtab + 1; 31497669Stjr } 31597669Stjr#endif 31697663Stjr for (ps = jp->ps ; ; ps++) { /* for each process */ 31797669Stjr if (sformat) { 318100308Stjr out1fmt("%d\n", (int)ps->pid); 31997669Stjr goto skip; 32097669Stjr } 32197822Stjr if (!lformat && ps != jp->ps && pid == 0) 32297669Stjr goto skip; 32397822Stjr if (pid != 0 && pid != ps->pid) 32497822Stjr goto skip; 32597819Stjr if (jobno == curr && ps == jp->ps) 32697669Stjr c = '+'; 32797819Stjr else if (jobno == prev && ps == jp->ps) 32897669Stjr c = '-'; 32997669Stjr else 33097669Stjr c = ' '; 33197663Stjr if (ps == jp->ps) 33297669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 33397663Stjr else 33497816Stjr fmtstr(s, 64, " %c ", c); 33597663Stjr out1str(s); 33697663Stjr col = strlen(s); 33797669Stjr if (lformat) { 338100308Stjr fmtstr(s, 64, "%d ", (int)ps->pid); 33997669Stjr out1str(s); 34097669Stjr col += strlen(s); 34197669Stjr } 34297663Stjr s[0] = '\0'; 34397819Stjr if (ps != jp->ps) { 34497819Stjr *s = '\0'; 34597819Stjr } else if (ps->status == -1) { 34697669Stjr strcpy(s, "Running"); 34797663Stjr } else if (WIFEXITED(ps->status)) { 34897820Stjr if (WEXITSTATUS(ps->status) == 0) 34997820Stjr strcpy(s, "Done"); 35097820Stjr else 35197820Stjr fmtstr(s, 64, "Done (%d)", 35297820Stjr WEXITSTATUS(ps->status)); 35397663Stjr } else { 35497663Stjr#if JOBS 35597663Stjr if (WIFSTOPPED(ps->status)) 35697663Stjr i = WSTOPSIG(ps->status); 35797663Stjr else 35897663Stjr#endif 35997663Stjr i = WTERMSIG(ps->status); 36097663Stjr if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 36197663Stjr scopy(sys_siglist[i & 0x7F], s); 36297663Stjr else 36397663Stjr fmtstr(s, 64, "Signal %d", i & 0x7F); 36497663Stjr if (WCOREDUMP(ps->status)) 36597663Stjr strcat(s, " (core dumped)"); 36697663Stjr } 36797663Stjr out1str(s); 36897663Stjr col += strlen(s); 36997663Stjr do { 37097663Stjr out1c(' '); 37197663Stjr col++; 37297663Stjr } while (col < 30); 37397663Stjr out1str(ps->cmd); 37497663Stjr out1c('\n'); 37597669Stjrskip: if (--procno <= 0) 37697663Stjr break; 37797663Stjr } 37897663Stjr} 37997663Stjr 3801556Srgrimes/* 3811556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 3821556Srgrimes * statuses have changed since the last call to showjobs. 3831556Srgrimes * 3841556Srgrimes * If the shell is interrupted in the process of creating a job, the 3851556Srgrimes * result may be a job structure containing zero processes. Such structures 3861556Srgrimes * will be freed here. 3871556Srgrimes */ 3881556Srgrimes 3891556Srgrimesvoid 39097669Stjrshowjobs(int change, int sformat, int lformat) 39117987Speter{ 3921556Srgrimes int jobno; 3931556Srgrimes struct job *jp; 3941556Srgrimes 3951556Srgrimes TRACE(("showjobs(%d) called\n", change)); 3961556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 3971556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 3981556Srgrimes if (! jp->used) 3991556Srgrimes continue; 4001556Srgrimes if (jp->nprocs == 0) { 4011556Srgrimes freejob(jp); 4021556Srgrimes continue; 4031556Srgrimes } 4041556Srgrimes if (change && ! jp->changed) 4051556Srgrimes continue; 40697822Stjr showjob(jp, 0, sformat, lformat); 4071556Srgrimes jp->changed = 0; 4081556Srgrimes if (jp->state == JOBDONE) { 4091556Srgrimes freejob(jp); 4101556Srgrimes } 4111556Srgrimes } 4121556Srgrimes} 4131556Srgrimes 4141556Srgrimes 4151556Srgrimes/* 4161556Srgrimes * Mark a job structure as unused. 4171556Srgrimes */ 4181556Srgrimes 4191556SrgrimesSTATIC void 42090111Simpfreejob(struct job *jp) 42190111Simp{ 4221556Srgrimes struct procstat *ps; 4231556Srgrimes int i; 4241556Srgrimes 4251556Srgrimes INTOFF; 4261556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4271556Srgrimes if (ps->cmd != nullstr) 4281556Srgrimes ckfree(ps->cmd); 4291556Srgrimes } 4301556Srgrimes if (jp->ps != &jp->ps0) 4311556Srgrimes ckfree(jp->ps); 4321556Srgrimes jp->used = 0; 4331556Srgrimes#if JOBS 43497659Stjr deljob(jp); 4351556Srgrimes#endif 4361556Srgrimes INTON; 4371556Srgrimes} 4381556Srgrimes 4391556Srgrimes 4401556Srgrimes 4411556Srgrimesint 44290111Simpwaitcmd(int argc, char **argv) 44317987Speter{ 4441556Srgrimes struct job *job; 44526104Ssteve int status, retval; 4461556Srgrimes struct job *jp; 4471556Srgrimes 4481556Srgrimes if (argc > 1) { 4491556Srgrimes job = getjob(argv[1]); 4501556Srgrimes } else { 4511556Srgrimes job = NULL; 4521556Srgrimes } 45338536Scracauer 45438536Scracauer /* 45538536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 45638536Scracauer * received. 45738536Scracauer */ 45838536Scracauer 45938521Scracauer in_waitcmd++; 46038536Scracauer do { 4611556Srgrimes if (job != NULL) { 4621556Srgrimes if (job->state) { 4631556Srgrimes status = job->ps[job->nprocs - 1].status; 46426104Ssteve if (WIFEXITED(status)) 46526104Ssteve retval = WEXITSTATUS(status); 4661556Srgrimes#if JOBS 46726104Ssteve else if (WIFSTOPPED(status)) 46826104Ssteve retval = WSTOPSIG(status) + 128; 4691556Srgrimes#endif 4701556Srgrimes else 47126104Ssteve retval = WTERMSIG(status) + 128; 4721556Srgrimes if (! iflag) 4731556Srgrimes freejob(job); 47438536Scracauer in_waitcmd--; 47526104Ssteve return retval; 4761556Srgrimes } 4771556Srgrimes } else { 4781556Srgrimes for (jp = jobtab ; ; jp++) { 4791556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 48038536Scracauer in_waitcmd--; 4811556Srgrimes return 0; 4821556Srgrimes } 4831556Srgrimes if (jp->used && jp->state == 0) 4841556Srgrimes break; 4851556Srgrimes } 4861556Srgrimes } 48738521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 48838521Scracauer in_waitcmd--; 48938521Scracauer 49038521Scracauer return 0; 4911556Srgrimes} 4921556Srgrimes 4931556Srgrimes 4941556Srgrimes 49517987Speterint 49690111Simpjobidcmd(int argc __unused, char **argv) 49717987Speter{ 4981556Srgrimes struct job *jp; 4991556Srgrimes int i; 5001556Srgrimes 5011556Srgrimes jp = getjob(argv[1]); 5021556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 503100308Stjr out1fmt("%d", (int)jp->ps[i].pid); 5041556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5051556Srgrimes } 5061556Srgrimes return 0; 5071556Srgrimes} 5081556Srgrimes 5091556Srgrimes 5101556Srgrimes 5111556Srgrimes/* 5121556Srgrimes * Convert a job name to a job structure. 5131556Srgrimes */ 5141556Srgrimes 5151556SrgrimesSTATIC struct job * 51690111Simpgetjob(char *name) 51790111Simp{ 5181556Srgrimes int jobno; 51997688Stjr struct job *found, *jp; 520100308Stjr pid_t pid; 5211556Srgrimes int i; 5221556Srgrimes 5231556Srgrimes if (name == NULL) { 5241556Srgrimes#if JOBS 52597659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5261556Srgrimes error("No current job"); 52797659Stjr return (jp); 5281556Srgrimes#else 5291556Srgrimes error("No current job"); 5301556Srgrimes#endif 5311556Srgrimes } else if (name[0] == '%') { 5321556Srgrimes if (is_digit(name[1])) { 5331556Srgrimes jobno = number(name + 1); 5341556Srgrimes if (jobno > 0 && jobno <= njobs 5351556Srgrimes && jobtab[jobno - 1].used != 0) 5361556Srgrimes return &jobtab[jobno - 1]; 5371556Srgrimes#if JOBS 5381556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5391556Srgrimes goto currentjob; 54097688Stjr } else if (name[1] == '+' && name[2] == '\0') { 54197688Stjr goto currentjob; 54297688Stjr } else if (name[1] == '-' && name[2] == '\0') { 54397688Stjr if ((jp = getcurjob(NULL)) == NULL || 54497688Stjr (jp = getcurjob(jp)) == NULL) 54597688Stjr error("No previous job"); 54697688Stjr return (jp); 5471556Srgrimes#endif 54897688Stjr } else if (name[1] == '?') { 54997688Stjr found = NULL; 55097688Stjr for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 55197688Stjr if (jp->used && jp->nprocs > 0 55297688Stjr && strstr(jp->ps[0].cmd, name + 2) != NULL) { 55397688Stjr if (found) 55497688Stjr error("%s: ambiguous", name); 55597688Stjr found = jp; 55697688Stjr } 55797688Stjr } 55897688Stjr if (found != NULL) 55997688Stjr return (found); 5601556Srgrimes } else { 56197688Stjr found = NULL; 5621556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5631556Srgrimes if (jp->used && jp->nprocs > 0 5641556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 5651556Srgrimes if (found) 5661556Srgrimes error("%s: ambiguous", name); 5671556Srgrimes found = jp; 5681556Srgrimes } 5691556Srgrimes } 5701556Srgrimes if (found) 5711556Srgrimes return found; 5721556Srgrimes } 5731556Srgrimes } else if (is_number(name)) { 574100308Stjr pid = (pid_t)number(name); 5751556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5761556Srgrimes if (jp->used && jp->nprocs > 0 5771556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 5781556Srgrimes return jp; 5791556Srgrimes } 5801556Srgrimes } 5811556Srgrimes error("No such job: %s", name); 58217987Speter /*NOTREACHED*/ 58317987Speter return NULL; 5841556Srgrimes} 5851556Srgrimes 5861556Srgrimes 5871556Srgrimes 5881556Srgrimes/* 5891556Srgrimes * Return a new job structure, 5901556Srgrimes */ 5911556Srgrimes 5921556Srgrimesstruct job * 59390111Simpmakejob(union node *node __unused, int nprocs) 59417987Speter{ 5951556Srgrimes int i; 5961556Srgrimes struct job *jp; 5971556Srgrimes 5981556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5991556Srgrimes if (--i < 0) { 6001556Srgrimes INTOFF; 6011556Srgrimes if (njobs == 0) { 6021556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 60397664Stjr#if JOBS 60497659Stjr jobmru = NULL; 60597664Stjr#endif 6061556Srgrimes } else { 6071556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 60817987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 60997659Stjr#if JOBS 61097659Stjr /* Relocate `next' pointers and list head */ 61199760Stjr if (jobmru != NULL) 61299760Stjr jobmru = &jp[jobmru - jobtab]; 61397659Stjr for (i = 0; i < njobs; i++) 61497659Stjr if (jp[i].next != NULL) 61597659Stjr jp[i].next = &jp[jp[i].next - 61697659Stjr jobtab]; 61797659Stjr#endif 61820425Ssteve /* Relocate `ps' pointers */ 61920425Ssteve for (i = 0; i < njobs; i++) 62020425Ssteve if (jp[i].ps == &jobtab[i].ps0) 62120425Ssteve jp[i].ps = &jp[i].ps0; 6221556Srgrimes ckfree(jobtab); 6231556Srgrimes jobtab = jp; 6241556Srgrimes } 6251556Srgrimes jp = jobtab + njobs; 6261556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 6271556Srgrimes INTON; 6281556Srgrimes break; 6291556Srgrimes } 6301556Srgrimes if (jp->used == 0) 6311556Srgrimes break; 6321556Srgrimes } 6331556Srgrimes INTOFF; 6341556Srgrimes jp->state = 0; 6351556Srgrimes jp->used = 1; 6361556Srgrimes jp->changed = 0; 6371556Srgrimes jp->nprocs = 0; 638100305Stjr jp->foreground = 0; 6391556Srgrimes#if JOBS 6401556Srgrimes jp->jobctl = jobctl; 64197659Stjr jp->next = NULL; 6421556Srgrimes#endif 6431556Srgrimes if (nprocs > 1) { 6441556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 6451556Srgrimes } else { 6461556Srgrimes jp->ps = &jp->ps0; 6471556Srgrimes } 6481556Srgrimes INTON; 64917987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 65017987Speter jp - jobtab + 1)); 6511556Srgrimes return jp; 6528855Srgrimes} 6531556Srgrimes 65497659Stjr#if JOBS 65597659StjrSTATIC void 65697659Stjrsetcurjob(struct job *cj) 65797659Stjr{ 65897659Stjr struct job *jp, *prev; 6591556Srgrimes 66097659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 66197659Stjr if (jp == cj) { 66297659Stjr if (prev != NULL) 66397659Stjr prev->next = jp->next; 66497659Stjr else 66597659Stjr jobmru = jp->next; 66697659Stjr jp->next = jobmru; 66797659Stjr jobmru = cj; 66897659Stjr return; 66997659Stjr } 67097659Stjr } 67197659Stjr cj->next = jobmru; 67297659Stjr jobmru = cj; 67397659Stjr} 67497659Stjr 67597659StjrSTATIC void 67697659Stjrdeljob(struct job *j) 67797659Stjr{ 67897659Stjr struct job *jp, *prev; 67997659Stjr 68097659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 68197659Stjr if (jp == j) { 68297659Stjr if (prev != NULL) 68397659Stjr prev->next = jp->next; 68497659Stjr else 68597659Stjr jobmru = jp->next; 68697659Stjr return; 68797659Stjr } 68897659Stjr } 68997659Stjr} 69097659Stjr 6911556Srgrimes/* 69297659Stjr * Return the most recently used job that isn't `nj', and preferably one 69397659Stjr * that is stopped. 69497659Stjr */ 69597659StjrSTATIC struct job * 69697659Stjrgetcurjob(struct job *nj) 69797659Stjr{ 69897659Stjr struct job *jp; 69997659Stjr 70097659Stjr /* Try to find a stopped one.. */ 70197659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 70297659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 70397659Stjr return (jp); 70497659Stjr /* Otherwise the most recently used job that isn't `nj' */ 70597659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 70697659Stjr if (jp->used && jp != nj) 70797659Stjr return (jp); 70897659Stjr 70997659Stjr return (NULL); 71097659Stjr} 71197659Stjr 71297659Stjr#endif 71397659Stjr 71497659Stjr/* 7151556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 7161556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 7171556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 7181556Srgrimes * be NULL. The mode parameter can be one of the following: 7191556Srgrimes * FORK_FG - Fork off a foreground process. 7201556Srgrimes * FORK_BG - Fork off a background process. 7211556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7221556Srgrimes * process group even if job control is on. 7231556Srgrimes * 7241556Srgrimes * When job control is turned off, background processes have their standard 7251556Srgrimes * input redirected to /dev/null (except for the second and later processes 7261556Srgrimes * in a pipeline). 7271556Srgrimes */ 7281556Srgrimes 729100308Stjrpid_t 73090111Simpforkshell(struct job *jp, union node *n, int mode) 73117987Speter{ 732100308Stjr pid_t pid; 733100308Stjr pid_t pgrp; 7341556Srgrimes 73517987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 73617987Speter mode)); 7371556Srgrimes INTOFF; 7381556Srgrimes pid = fork(); 7391556Srgrimes if (pid == -1) { 7401556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 7411556Srgrimes INTON; 74253891Scracauer error("Cannot fork: %s", strerror(errno)); 7431556Srgrimes } 7441556Srgrimes if (pid == 0) { 7451556Srgrimes struct job *p; 7461556Srgrimes int wasroot; 7471556Srgrimes int i; 7481556Srgrimes 749100308Stjr TRACE(("Child shell %d\n", (int)getpid())); 7501556Srgrimes wasroot = rootshell; 7511556Srgrimes rootshell = 0; 7521556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 7531556Srgrimes if (p->used) 7541556Srgrimes freejob(p); 7551556Srgrimes closescript(); 7561556Srgrimes INTON; 7571556Srgrimes clear_traps(); 7581556Srgrimes#if JOBS 7591556Srgrimes jobctl = 0; /* do job control only in root shell */ 7601556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 7611556Srgrimes if (jp == NULL || jp->nprocs == 0) 7621556Srgrimes pgrp = getpid(); 7631556Srgrimes else 7641556Srgrimes pgrp = jp->ps[0].pid; 76521352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 7661556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 76799762Stjr if (tcsetpgrp(ttyfd, pgrp) < 0) 76820425Ssteve error("tcsetpgrp failed, errno=%d", errno); 7691556Srgrimes } 7701556Srgrimes setsignal(SIGTSTP); 7711556Srgrimes setsignal(SIGTTOU); 7721556Srgrimes } else if (mode == FORK_BG) { 7731556Srgrimes ignoresig(SIGINT); 7741556Srgrimes ignoresig(SIGQUIT); 7751556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7761556Srgrimes ! fd0_redirected_p ()) { 7771556Srgrimes close(0); 77869793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 77969793Sobrien error("Can't open %s: %s", 78069793Sobrien _PATH_DEVNULL, strerror(errno)); 7811556Srgrimes } 7821556Srgrimes } 7831556Srgrimes#else 7841556Srgrimes if (mode == FORK_BG) { 7851556Srgrimes ignoresig(SIGINT); 7861556Srgrimes ignoresig(SIGQUIT); 7871556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7881556Srgrimes ! fd0_redirected_p ()) { 7891556Srgrimes close(0); 79069793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 79169793Sobrien error("Can't open %s: %s", 79269793Sobrien _PATH_DEVNULL, strerror(errno)); 7931556Srgrimes } 7941556Srgrimes } 7951556Srgrimes#endif 7961556Srgrimes if (wasroot && iflag) { 7971556Srgrimes setsignal(SIGINT); 7981556Srgrimes setsignal(SIGQUIT); 7991556Srgrimes setsignal(SIGTERM); 8001556Srgrimes } 8011556Srgrimes return pid; 8021556Srgrimes } 8031556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 8041556Srgrimes if (jp == NULL || jp->nprocs == 0) 8051556Srgrimes pgrp = pid; 8061556Srgrimes else 8071556Srgrimes pgrp = jp->ps[0].pid; 80817987Speter setpgid(pid, pgrp); 8091556Srgrimes } 8101556Srgrimes if (mode == FORK_BG) 8111556Srgrimes backgndpid = pid; /* set $! */ 8121556Srgrimes if (jp) { 8131556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8141556Srgrimes ps->pid = pid; 8151556Srgrimes ps->status = -1; 8161556Srgrimes ps->cmd = nullstr; 8171556Srgrimes if (iflag && rootshell && n) 8181556Srgrimes ps->cmd = commandtext(n); 819100305Stjr jp->foreground = mode == FORK_FG; 82097659Stjr#if JOBS 82197659Stjr setcurjob(jp); 82297659Stjr#endif 8231556Srgrimes } 8241556Srgrimes INTON; 825100308Stjr TRACE(("In parent shell: child = %d\n", (int)pid)); 8261556Srgrimes return pid; 8271556Srgrimes} 8281556Srgrimes 8291556Srgrimes 8301556Srgrimes 8311556Srgrimes/* 8321556Srgrimes * Wait for job to finish. 8331556Srgrimes * 8341556Srgrimes * Under job control we have the problem that while a child process is 8351556Srgrimes * running interrupts generated by the user are sent to the child but not 8361556Srgrimes * to the shell. This means that an infinite loop started by an inter- 8371556Srgrimes * active user may be hard to kill. With job control turned off, an 8381556Srgrimes * interactive user may place an interactive program inside a loop. If 8391556Srgrimes * the interactive program catches interrupts, the user doesn't want 8401556Srgrimes * these interrupts to also abort the loop. The approach we take here 8411556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 84246684Skris * foreground process to terminate, and then send itself an interrupt 8431556Srgrimes * signal if the child process was terminated by an interrupt signal. 8441556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 8451556Srgrimes * exit on interrupt; unless these processes terminate themselves by 8461556Srgrimes * sending a signal to themselves (instead of calling exit) they will 8471556Srgrimes * confuse this approach. 8481556Srgrimes */ 8491556Srgrimes 8501556Srgrimesint 85190111Simpwaitforjob(struct job *jp, int *origstatus) 85245916Scracauer{ 8531556Srgrimes#if JOBS 854100308Stjr pid_t mypgrp = getpgrp(); 8551556Srgrimes#endif 8561556Srgrimes int status; 8571556Srgrimes int st; 8581556Srgrimes 8591556Srgrimes INTOFF; 8601556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 86138950Scracauer while (jp->state == 0) 86238950Scracauer if (dowait(1, jp) == -1) 86338950Scracauer dotrap(); 8641556Srgrimes#if JOBS 8651556Srgrimes if (jp->jobctl) { 86699762Stjr if (tcsetpgrp(ttyfd, mypgrp) < 0) 86720425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 8681556Srgrimes } 8691556Srgrimes if (jp->state == JOBSTOPPED) 87097659Stjr setcurjob(jp); 8711556Srgrimes#endif 8721556Srgrimes status = jp->ps[jp->nprocs - 1].status; 87345916Scracauer if (origstatus != NULL) 87445916Scracauer *origstatus = status; 8751556Srgrimes /* convert to 8 bits */ 87626104Ssteve if (WIFEXITED(status)) 87726104Ssteve st = WEXITSTATUS(status); 8781556Srgrimes#if JOBS 87926104Ssteve else if (WIFSTOPPED(status)) 88026104Ssteve st = WSTOPSIG(status) + 128; 8811556Srgrimes#endif 8821556Srgrimes else 88326104Ssteve st = WTERMSIG(status) + 128; 8841556Srgrimes if (! JOBS || jp->state == JOBDONE) 8851556Srgrimes freejob(jp); 88638521Scracauer if (int_pending()) { 88738521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 88838521Scracauer kill(getpid(), SIGINT); 88938521Scracauer else 89038521Scracauer CLEAR_PENDING_INT; 89138521Scracauer } 8921556Srgrimes INTON; 8931556Srgrimes return st; 8941556Srgrimes} 8951556Srgrimes 8961556Srgrimes 8971556Srgrimes 8981556Srgrimes/* 8991556Srgrimes * Wait for a process to terminate. 9001556Srgrimes */ 9011556Srgrimes 902100308StjrSTATIC pid_t 90390111Simpdowait(int block, struct job *job) 90417987Speter{ 905100308Stjr pid_t pid; 9061556Srgrimes int status; 9071556Srgrimes struct procstat *sp; 9081556Srgrimes struct job *jp; 9091556Srgrimes struct job *thisjob; 9101556Srgrimes int done; 9111556Srgrimes int stopped; 91226104Ssteve int sig; 913100305Stjr int i; 9141556Srgrimes 91538950Scracauer in_dowait++; 9161556Srgrimes TRACE(("dowait(%d) called\n", block)); 9171556Srgrimes do { 9181556Srgrimes pid = waitproc(block, &status); 919100308Stjr TRACE(("wait returns %d, status=%d\n", (int)pid, status)); 92072086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 92172086Scracauer (WIFSTOPPED(status) && !iflag)); 92238950Scracauer in_dowait--; 92338521Scracauer if (breakwaitcmd != 0) { 92438521Scracauer breakwaitcmd = 0; 92538521Scracauer return -1; 92638521Scracauer } 9271556Srgrimes if (pid <= 0) 9281556Srgrimes return pid; 9291556Srgrimes INTOFF; 9301556Srgrimes thisjob = NULL; 9311556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 9321556Srgrimes if (jp->used) { 9331556Srgrimes done = 1; 9341556Srgrimes stopped = 1; 9351556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 9361556Srgrimes if (sp->pid == -1) 9371556Srgrimes continue; 9381556Srgrimes if (sp->pid == pid) { 93926104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 940100308Stjr (int)pid, sp->status, 941100308Stjr status)); 9421556Srgrimes sp->status = status; 9431556Srgrimes thisjob = jp; 9441556Srgrimes } 9451556Srgrimes if (sp->status == -1) 9461556Srgrimes stopped = 0; 94726104Ssteve else if (WIFSTOPPED(sp->status)) 9481556Srgrimes done = 0; 9491556Srgrimes } 9501556Srgrimes if (stopped) { /* stopped or done */ 9511556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 9521556Srgrimes if (jp->state != state) { 9531556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 9541556Srgrimes jp->state = state; 9551556Srgrimes#if JOBS 95697659Stjr if (done) 95797659Stjr deljob(jp); 9581556Srgrimes#endif 9591556Srgrimes } 9601556Srgrimes } 9611556Srgrimes } 9621556Srgrimes } 9631556Srgrimes INTON; 9641556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 9651556Srgrimes#if JOBS 96626104Ssteve if (WIFSTOPPED(status)) 96726104Ssteve sig = WSTOPSIG(status); 96826104Ssteve else 9691556Srgrimes#endif 97097663Stjr { 97126104Ssteve if (WIFEXITED(status)) 97226104Ssteve sig = 0; 97326104Ssteve else 97426104Ssteve sig = WTERMSIG(status); 9751556Srgrimes } 976100305Stjr if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 977100305Stjr if (jp->foreground) { 978100305Stjr#if JOBS 979100305Stjr if (WIFSTOPPED(status)) 980100305Stjr i = WSTOPSIG(status); 981100305Stjr else 982100305Stjr#endif 983100305Stjr i = WTERMSIG(status); 984100305Stjr if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 985100305Stjr out1str(sys_siglist[i & 0x7F]); 986100305Stjr else 987100305Stjr out1fmt("Signal %d", i & 0x7F); 988100305Stjr if (WCOREDUMP(status)) 989100305Stjr out1str(" (core dumped)"); 990100305Stjr out1c('\n'); 991100305Stjr } else 992100305Stjr showjob(thisjob, pid, 0, 1); 993100305Stjr } 9941556Srgrimes } else { 9951556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 9961556Srgrimes if (thisjob) 9971556Srgrimes thisjob->changed = 1; 9981556Srgrimes } 9991556Srgrimes return pid; 10001556Srgrimes} 10011556Srgrimes 10021556Srgrimes 10031556Srgrimes 10041556Srgrimes/* 10051556Srgrimes * Do a wait system call. If job control is compiled in, we accept 10061556Srgrimes * stopped processes. If block is zero, we return a value of zero 10071556Srgrimes * rather than blocking. 10081556Srgrimes * 10091556Srgrimes * System V doesn't have a non-blocking wait system call. It does 10101556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 10111556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 10121556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 10131556Srgrimes * was received, and have waitproc bump another counter when it got 10141556Srgrimes * the status of a process. Waitproc would then know that a wait 10151556Srgrimes * system call would not block if the two counters were different. 10161556Srgrimes * This approach doesn't work because if a process has children that 10171556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 10181556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 10191556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 10201556Srgrimes * until is runs out of stack space, unless it does a wait call before 10211556Srgrimes * restoring the signal handler. The code below takes advantage of 10221556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 10231556Srgrimes * then checking to see whether it was called. If there are any 10241556Srgrimes * children to be waited for, it will be. 10251556Srgrimes * 10261556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 10271556Srgrimes * waits at all. In this case, the user will not be informed when 10281556Srgrimes * a background process until the next time she runs a real program 10291556Srgrimes * (as opposed to running a builtin command or just typing return), 10301556Srgrimes * and the jobs command may give out of date information. 10311556Srgrimes */ 10321556Srgrimes 10331556Srgrimes#ifdef SYSV 103438521ScracauerSTATIC sig_atomic_t gotsigchild; 10351556Srgrimes 10361556SrgrimesSTATIC int onsigchild() { 10371556Srgrimes gotsigchild = 1; 10381556Srgrimes} 10391556Srgrimes#endif 10401556Srgrimes 10411556Srgrimes 1042100308StjrSTATIC pid_t 104390111Simpwaitproc(int block, int *status) 104417987Speter{ 10451556Srgrimes#ifdef BSD 10461556Srgrimes int flags; 10471556Srgrimes 10481556Srgrimes#if JOBS 10491556Srgrimes flags = WUNTRACED; 10501556Srgrimes#else 10511556Srgrimes flags = 0; 10521556Srgrimes#endif 10531556Srgrimes if (block == 0) 10541556Srgrimes flags |= WNOHANG; 10551556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 10561556Srgrimes#else 10571556Srgrimes#ifdef SYSV 10581556Srgrimes int (*save)(); 10591556Srgrimes 10601556Srgrimes if (block == 0) { 10611556Srgrimes gotsigchild = 0; 10621556Srgrimes save = signal(SIGCLD, onsigchild); 10631556Srgrimes signal(SIGCLD, save); 10641556Srgrimes if (gotsigchild == 0) 10651556Srgrimes return 0; 10661556Srgrimes } 10671556Srgrimes return wait(status); 10681556Srgrimes#else 10691556Srgrimes if (block == 0) 10701556Srgrimes return 0; 10711556Srgrimes return wait(status); 10721556Srgrimes#endif 10731556Srgrimes#endif 10741556Srgrimes} 10751556Srgrimes 10761556Srgrimes/* 10771556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10781556Srgrimes */ 10791556Srgrimesint job_warning = 0; 10801556Srgrimesint 108190111Simpstoppedjobs(void) 10821556Srgrimes{ 108325222Ssteve int jobno; 108425222Ssteve struct job *jp; 10851556Srgrimes 10861556Srgrimes if (job_warning) 10871556Srgrimes return (0); 10881556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 10891556Srgrimes if (jp->used == 0) 10901556Srgrimes continue; 10911556Srgrimes if (jp->state == JOBSTOPPED) { 10921556Srgrimes out2str("You have stopped jobs.\n"); 10931556Srgrimes job_warning = 2; 10941556Srgrimes return (1); 10951556Srgrimes } 10961556Srgrimes } 10971556Srgrimes 10981556Srgrimes return (0); 10991556Srgrimes} 11001556Srgrimes 11011556Srgrimes/* 11021556Srgrimes * Return a string identifying a command (to be printed by the 11031556Srgrimes * jobs command. 11041556Srgrimes */ 11051556Srgrimes 11061556SrgrimesSTATIC char *cmdnextc; 11071556SrgrimesSTATIC int cmdnleft; 11081556Srgrimes#define MAXCMDTEXT 200 11091556Srgrimes 11101556Srgrimeschar * 111190111Simpcommandtext(union node *n) 111290111Simp{ 11131556Srgrimes char *name; 11141556Srgrimes 11151556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 11161556Srgrimes cmdnleft = MAXCMDTEXT - 4; 11171556Srgrimes cmdtxt(n); 11181556Srgrimes *cmdnextc = '\0'; 11191556Srgrimes return name; 11201556Srgrimes} 11211556Srgrimes 11221556Srgrimes 11231556SrgrimesSTATIC void 112490111Simpcmdtxt(union node *n) 112590111Simp{ 11261556Srgrimes union node *np; 11271556Srgrimes struct nodelist *lp; 11281556Srgrimes char *p; 11291556Srgrimes int i; 11301556Srgrimes char s[2]; 11311556Srgrimes 11321556Srgrimes if (n == NULL) 11331556Srgrimes return; 11341556Srgrimes switch (n->type) { 11351556Srgrimes case NSEMI: 11361556Srgrimes cmdtxt(n->nbinary.ch1); 11371556Srgrimes cmdputs("; "); 11381556Srgrimes cmdtxt(n->nbinary.ch2); 11391556Srgrimes break; 11401556Srgrimes case NAND: 11411556Srgrimes cmdtxt(n->nbinary.ch1); 11421556Srgrimes cmdputs(" && "); 11431556Srgrimes cmdtxt(n->nbinary.ch2); 11441556Srgrimes break; 11451556Srgrimes case NOR: 11461556Srgrimes cmdtxt(n->nbinary.ch1); 11471556Srgrimes cmdputs(" || "); 11481556Srgrimes cmdtxt(n->nbinary.ch2); 11491556Srgrimes break; 11501556Srgrimes case NPIPE: 11511556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 11521556Srgrimes cmdtxt(lp->n); 11531556Srgrimes if (lp->next) 11541556Srgrimes cmdputs(" | "); 11551556Srgrimes } 11561556Srgrimes break; 11571556Srgrimes case NSUBSHELL: 11581556Srgrimes cmdputs("("); 11591556Srgrimes cmdtxt(n->nredir.n); 11601556Srgrimes cmdputs(")"); 11611556Srgrimes break; 11621556Srgrimes case NREDIR: 11631556Srgrimes case NBACKGND: 11641556Srgrimes cmdtxt(n->nredir.n); 11651556Srgrimes break; 11661556Srgrimes case NIF: 11671556Srgrimes cmdputs("if "); 11681556Srgrimes cmdtxt(n->nif.test); 11691556Srgrimes cmdputs("; then "); 11701556Srgrimes cmdtxt(n->nif.ifpart); 11711556Srgrimes cmdputs("..."); 11721556Srgrimes break; 11731556Srgrimes case NWHILE: 11741556Srgrimes cmdputs("while "); 11751556Srgrimes goto until; 11761556Srgrimes case NUNTIL: 11771556Srgrimes cmdputs("until "); 11781556Srgrimesuntil: 11791556Srgrimes cmdtxt(n->nbinary.ch1); 11801556Srgrimes cmdputs("; do "); 11811556Srgrimes cmdtxt(n->nbinary.ch2); 11821556Srgrimes cmdputs("; done"); 11831556Srgrimes break; 11841556Srgrimes case NFOR: 11851556Srgrimes cmdputs("for "); 11861556Srgrimes cmdputs(n->nfor.var); 11871556Srgrimes cmdputs(" in ..."); 11881556Srgrimes break; 11891556Srgrimes case NCASE: 11901556Srgrimes cmdputs("case "); 11911556Srgrimes cmdputs(n->ncase.expr->narg.text); 11921556Srgrimes cmdputs(" in ..."); 11931556Srgrimes break; 11941556Srgrimes case NDEFUN: 11951556Srgrimes cmdputs(n->narg.text); 11961556Srgrimes cmdputs("() ..."); 11971556Srgrimes break; 11981556Srgrimes case NCMD: 11991556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 12001556Srgrimes cmdtxt(np); 12011556Srgrimes if (np->narg.next) 12021556Srgrimes cmdputs(" "); 12031556Srgrimes } 12041556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 12051556Srgrimes cmdputs(" "); 12061556Srgrimes cmdtxt(np); 12071556Srgrimes } 12081556Srgrimes break; 12091556Srgrimes case NARG: 12101556Srgrimes cmdputs(n->narg.text); 12111556Srgrimes break; 12121556Srgrimes case NTO: 12131556Srgrimes p = ">"; i = 1; goto redir; 12141556Srgrimes case NAPPEND: 12151556Srgrimes p = ">>"; i = 1; goto redir; 12161556Srgrimes case NTOFD: 12171556Srgrimes p = ">&"; i = 1; goto redir; 121896922Stjr case NCLOBBER: 121996922Stjr p = ">|"; i = 1; goto redir; 12201556Srgrimes case NFROM: 12211556Srgrimes p = "<"; i = 0; goto redir; 122266612Sbrian case NFROMTO: 122366612Sbrian p = "<>"; i = 0; goto redir; 12241556Srgrimes case NFROMFD: 12251556Srgrimes p = "<&"; i = 0; goto redir; 12261556Srgrimesredir: 12271556Srgrimes if (n->nfile.fd != i) { 12281556Srgrimes s[0] = n->nfile.fd + '0'; 12291556Srgrimes s[1] = '\0'; 12301556Srgrimes cmdputs(s); 12311556Srgrimes } 12321556Srgrimes cmdputs(p); 12331556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 123499634Stjr if (n->ndup.dupfd >= 0) 123599634Stjr s[0] = n->ndup.dupfd + '0'; 123699634Stjr else 123799634Stjr s[0] = '-'; 12381556Srgrimes s[1] = '\0'; 12391556Srgrimes cmdputs(s); 12401556Srgrimes } else { 12411556Srgrimes cmdtxt(n->nfile.fname); 12421556Srgrimes } 12431556Srgrimes break; 12441556Srgrimes case NHERE: 12451556Srgrimes case NXHERE: 12461556Srgrimes cmdputs("<<..."); 12471556Srgrimes break; 12481556Srgrimes default: 12491556Srgrimes cmdputs("???"); 12501556Srgrimes break; 12511556Srgrimes } 12521556Srgrimes} 12531556Srgrimes 12541556Srgrimes 12551556Srgrimes 12561556SrgrimesSTATIC void 125790111Simpcmdputs(char *s) 125890111Simp{ 125925222Ssteve char *p, *q; 126025222Ssteve char c; 12611556Srgrimes int subtype = 0; 12621556Srgrimes 12631556Srgrimes if (cmdnleft <= 0) 12641556Srgrimes return; 12651556Srgrimes p = s; 12661556Srgrimes q = cmdnextc; 12671556Srgrimes while ((c = *p++) != '\0') { 12681556Srgrimes if (c == CTLESC) 12691556Srgrimes *q++ = *p++; 12701556Srgrimes else if (c == CTLVAR) { 12711556Srgrimes *q++ = '$'; 12721556Srgrimes if (--cmdnleft > 0) 12731556Srgrimes *q++ = '{'; 12741556Srgrimes subtype = *p++; 12751556Srgrimes } else if (c == '=' && subtype != 0) { 12761556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 12771556Srgrimes subtype = 0; 12781556Srgrimes } else if (c == CTLENDVAR) { 12791556Srgrimes *q++ = '}'; 128018954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 12811556Srgrimes cmdnleft++; /* ignore it */ 12821556Srgrimes else 12831556Srgrimes *q++ = c; 12841556Srgrimes if (--cmdnleft <= 0) { 12851556Srgrimes *q++ = '.'; 12861556Srgrimes *q++ = '.'; 12871556Srgrimes *q++ = '.'; 12881556Srgrimes break; 12891556Srgrimes } 12901556Srgrimes } 12911556Srgrimes cmdnextc = q; 12921556Srgrimes} 1293